As Luke pointed out, Wikipedia has a detailed article on the fate of the Armada ships that were wrecked off Ireland, which suggests that there were very few survivors and the majority of those that made it ashore alive were executed by the English or murdered by the Irish.
The fact that being found to protect a survivor would have placed the protector at great risk makes it unlikely that church records would have been kept of any lucky enough to evade those two fates. Most that did evade capture or murder seem to have been sent on to Scotland for safety (then a separate country).
Franscisco de Cuellar gives an account of what happened to him in Ireland en route to Scotland. (See Wikipedia for a summary.) He does not seem to have been impressed by the 'hospitality' he received, even including an offer of marriage.
In short, although it's not impossible that a very few Spanish survivors were absorbed into the Irish population (or left a genetic legacy behind on their way through to Scotland), it doesn't sound as if it was a widespread phenomenon or one that would have been recorded at the time.